Keithley 2635 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 12-59
Series 2600 System SourceMeter® Instruments Reference Manual Section 12: Instrument Control Library
smuX.measure.delayfactor
X= SMU channel (a or b)
(Models 2635 and 2636 only)
Attribute This attribute is a multiplier to smuX.DELAY_AUTO measurement delays.
Usage
delayfactor = smuX.measure.delayfactor --Read the delay factor.
smuX.measure.delayfactor = delayfactor --Set the delay factor.
Remarks • The delay factor is only applied when
smuX.measure.delay = smuX.DELAY_AUTO.
• The default value is 1.0.
• This attribute can be set to a value less than 1 (e.g. 0.5) to decrease the automatic delay.
• This attribute can be set to a value greater than 1 (e.g. 1.5 or 2.0) to increase the
automatic delay.
• Setting this attribute to zero disables delays, even when
smuX.measure.delay = smuX.DELAY_AUTO.
Also see smuX.measure.delay
Example smuX.measure.delayfactor = 2.0 Increase the automatic delay by 2 times.
smuX.measure.filter.count
X = SMU channel (a or b)
Attribute Number of measured readings to yield one filtered measurement.
Usage count = smuX.measure.filter.count -- Reads filter count.
smuX.measure.filter.count = count -- Writes filter count.
count Set filter count from 1 to 100.
Remarks • This attribute is the number of measurements that will be performed to yield one
filtered measurement.
• The reset function sets the filter count to 1.
Details See “Filters” in Section 6.
Also see smuX.measure.filter.enable, smuX.measure.filter.type
Example Sets filter count for SMU A:
smua.measure.filter.count = 10
smuX.measure.filter.enable
X = SMU channel (a or b)
Attribute Enables/disables filtered measurements.
Usage filter = smuX.measure.filter.enable -- Reads on/off state of the filter.
smuX.measure.filter.enable = filter -- Writes on/off state of the filter.
Set filter to one of the following values:
0 or smuX.FILTER_OFF Disables the filter.
1 or smuX.FILTER_ON Enables the filter.
Remarks • This attribute enables or disables the filter.
• The reset function disables the filter.
• The median filter uses a first-in, first-out stack. When the stack (filter count) becomes full,
the “middle-most” reading is returned. For each subsequent conversion placed into the
stack, the oldest reading is discarded. The stack is then re-sorted, yielding a new
reading. If the filter count is an even number, the reading returned is the average of the
two middle readings.
Details See “Filters” in Section 6.
Also see smuX.measure.filter.count, smuX.measure.filter.type
• The median filter uses a first-in, first-out stack. When the stack (filter count) becomes full,
the “middle-most” reading is returned. For each subsequent conversion placed into the
stack, the oldest reading is discarded. The stack is then re-sorted, yielding a new
reading. If the filter count is an even number, the reading returned is the average of the
two middle readings.

Keithley 2635 Specifications

General

Brand	Keithley
Model	2635
Category	Measuring Instruments
Language	English